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Erschienen in: Polymer Bulletin 8/2020

13.09.2019 | Original Paper

Swelling and drug delivery kinetics of click-synthesized hydrogels based on various combinations of PEG and star-shaped PCL: influence of network parameters on swelling and release behavior

verfasst von: Mohammad Saidi, Alaleh Dabbaghi, Sohrab Rahmani

Erschienen in: Polymer Bulletin | Ausgabe 8/2020

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Abstract

Polyethylene glycol (PEG)- and polyethylene glycol–polycaprolactone (PEG–PCL)-based hydrogels were synthesized with various compositions of prepolymers by using ROP and click chemistry methods. Relevant prepolymers were characterized by 1H NMR and FTIR spectroscopy. In order to study the influence of network parameters on swelling and release kinetics, experimental data were approximated by several mathematical models including zero order, first order, Higuchi and Korsmeyer–Peppas to determine the kinetics of swelling and diclofenac sodium release from hydrogels. The obtained results showed that the swelling and release data were best fitted to Korsmeyer–Peppas model. The results of the swelling study showed that the swelling properties of the hydrogels varied with the changes in the PEG molecular weights, as well as concentration of PCL. All of the hydrogels showed non-Fickian diffusion, but when PCL concentration increased and PEG molecular weights decreased, the n values were decreased and reached n = 0.5 (Fickian diffusion). The kinetics of diclofenac sodium release from hydrogels showed similar behavior so that in F hydrogels with the highest PCL concentration, the release mechanism fully changed from non-Fickian to Fickian diffusion. In other words, with increasing cross-link density and PCL concentration, the swelling degree and flexibility of networks decreased. Therefore, the swelling and release mechanism changed from non-Fickian to Fickian diffusion.

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Literatur
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Zurück zum Zitat Wang C-W, Liu C, Zhu X-W et al (2016) Synthesis of well-defined star-shaped poly(ε-caprolactone)/poly (ethylene glycol) amphiphilic co-networks by combination of ring opening polymerization and “click” chemistry. J Polym Sci Part A Polym Chem 54:407–417. https://doi.org/10.1002/pola.27790 CrossRef Wang C-W, Liu C, Zhu X-W et al (2016) Synthesis of well-defined star-shaped poly(ε-caprolactone)/poly (ethylene glycol) amphiphilic co-networks by combination of ring opening polymerization and “click” chemistry. J Polym Sci Part A Polym Chem 54:407–417. https://​doi.​org/​10.​1002/​pola.​27790 CrossRef
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Zurück zum Zitat Dabbaghi A, Rahmani S (2019) Synthesis and characterization of biodegradable multicomponent amphiphilic conetworks with tunable swelling through combination of ring-opening polymerization and “click” chemistry method as a controlled release formulation for 2,4-dichlorophenoxyacetic acid herbicide. Polym Adv Technol 30:368–380. https://doi.org/10.1002/pat.4474 CrossRef Dabbaghi A, Rahmani S (2019) Synthesis and characterization of biodegradable multicomponent amphiphilic conetworks with tunable swelling through combination of ring-opening polymerization and “click” chemistry method as a controlled release formulation for 2,4-dichlorophenoxyacetic acid herbicide. Polym Adv Technol 30:368–380. https://​doi.​org/​10.​1002/​pat.​4474 CrossRef
Metadaten
Titel
Swelling and drug delivery kinetics of click-synthesized hydrogels based on various combinations of PEG and star-shaped PCL: influence of network parameters on swelling and release behavior
verfasst von
Mohammad Saidi
Alaleh Dabbaghi
Sohrab Rahmani
Publikationsdatum
13.09.2019
Verlag
Springer Berlin Heidelberg
Erschienen in
Polymer Bulletin / Ausgabe 8/2020
Print ISSN: 0170-0839
Elektronische ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-019-02948-z

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